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Questions in mathematics

[Solved] Taking successive discounts of 15% off and then 25% off is the same as taking a one time discount of 40%. Please select the best answer from the choices provided. True False

[Solved] $(3 x^2-10 x-2)-(6 x+3)

[Solved] Which statement is true about the equation $(x-4)(x+2)=16$? A. The equation $x-4=16$ can be used to solve for a solution of the given equation. B. The standard form of the equation is $x^2-2 x-8=0$. C. The factored form of the equation is $(x+4)(x-6)=0$. D. One solution of the equation is $x=-6$.

[Solved] Which values of [tex]$x$[/tex] and [tex]$y$[/tex] would make the following expression represent a real number? [tex](4+5 i)(x+y i)$[/tex] A. [tex]$x=4, y=5$[/tex] B. [tex]$x=-4, y=0$[/tex] C. [tex]$x=4, y=-5$[/tex] D. [tex]$x=0, y=5$[/tex]

[Solved] Write [tex] \frac{2}{3} \cdot \frac{2}{3} \cdot \frac{2}{3} \cdot \frac{2}{3} \cdot \frac{2}{3} [/tex] in exponential form.

[Solved] Problems 15-16: Use the table below to determine the degree of the polynomial. 15. \begin{tabular}{|c|c|c|c|c|c|c|c|} \hline$x$ & -3 & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline$g(x)$ & 30 & 15 & 4 & -3 & -6 & -5 & 0 \\ \hline \end{tabular}

[Solved] Xavier is attempting to recreate a problem his teacher showed him in class. To do so, he creates the table below. \begin{tabular}{|c|c|} \hline$x$ & $y$ \\ \hline 1 & 3 \\ \hline 2 & $?$ \\ \hline \end{tabular} He remembers that the slope of the line through the ordered pairs in the table was 4. What is the missing $y$-value in the table?

[Solved] What is the value of $x$ in the equation $4x + 8y = 40$, when $y = 0.8$?

[Solved] Select the correct answer. What is the simplified form of this expression? [tex]$\left(-3 x^2+4 x\right)+\left(2 x^2-x-11\right)$[/tex] A. [tex]$-x^2+5 x-11$[/tex] B. [tex]$-x^2+3 x-11$[/tex] C. [tex]$-x^2+3 x+11$[/tex] D. [tex]$-x^2+5 x+11$[/tex]

[Solved] A penguin walks south. It completes the first mile in an hour and continues walking at the same rate. What is the penguin's speed in miles per hour? Show your work.